Hyde, M.A., Wursten, B.T. and Ballings, P. (2002-2012). Pteridium aquilinum (L.) Kuhn subsp. centrali-africanum Hieron. ex R.E.Fr. Flora of Zimbabwe website. Accessed 5 June 2012 at http://www.zimbabweflora.co.zw/speciesdata/species.php?species_id=101330